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Re^4: "defined" in while loop Edit | Delete | Quote | Reply | Private Reply

by ikegami (Pope)
on Feb 22, 2009 at 23:55 UTC ( #745672=note: print w/replies, xml ) Need Help??

in reply to Re^3: "defined" in while loop Edit | Delete | Quote | Reply | Private Reply
in thread "defined" in while loop Edit | Delete | Quote | Reply | Private Reply

Another convenience feature?

Yes. It rarely matters, since most uses of <>/readline are for reading newline-terminated lines, which are necessarily true.

And where else does this happen?

It depends on your perception of "this". Perl does many things implicitly, but none other exactly like this.

It is also not anything special about the syntax $somevar = <> because I get the same result if I use readline(...)

It's not specific to the symtax, it's specific to the operator. <> (when used to read from a file) and readline are the same operator.

>perl -MO=Concise -e"my $fh; readline($fh)" ... 6 <1> readline[t2] vK/1 ->7 5 <0> padsv[$fh:1,2] ->6 -e syntax OK >perl -MO=Concise -e"my $fh; <$fh>" ... 6 <1> readline[t2] vK*/1 ->7 5 <0> padsv[$fh:1,2] s ->6 -e syntax OK

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[PriNet]: go figure, i just tried that, it retains some of the values (not the key) of the pre-assigned value
[PriNet]: i guess i'll just have to use two seperate hashes, there are two, but one is larger than the other, and when i reference the smaller one, it holds onto the values that were assigned to the larger hash (the keynames change, but unless i reassign a new valu

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